the whole soil. This is consistent with whole soil KOC values being
influenced by interactions between organic matter and soil minerals
(Ahangar et al., 2008b). By far the strongest correlation is
between the proportion of aryl-C and KOC for the HF-treated soils;
Table 4 shows that variation in aryl C accounts for 40% (R2 = 0.40)
of the variability in KOC for the HF-treated soils. This is again consistent
with the findings of Ahangar et al. (2008b) and also Ahmad
et al. (2001), who reported strong correlations between aryl C and
KOC for two non-ionic pesticides.